GUI Reference
R&S
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ZNC
219
User Manual 1173.9557.02 ─ 13
The sweep points for "Lin Frequency" sweeps may alternatively be defined using the
"Frequency Step Size".
Tip: Measurement time and screen resolution
A large number of points improve the resolution of the trace but increases the measure-
ment time. The overall measurement time is composed of the hardware settling time at
the beginning of the sweep plus the sum of the measurement times at each individual
sweep point. This implies that the measurement time increases roughly linearly with the
number of points.
See also
chapter 3.1.4, "Sweep Control"
Remote command:
Freq Step Size
Sets the distance between two consecutive frequency sweep points.
The step size is an alternative to the "Number of Points" setting:
●
If the sweep range is defined by means of the "Start" and "Stop" variables, both the
"Stop" value and the "Number of Points" can vary as the "Freq Step Size" is changed.
The "Stop" value is changed as little as possible so that the condition "Freq Step
Size" = "(Stop – Start) / (Number of Points – 1)" can be fulfilled. Changing the Start
and Stop values modifies the "Freq Step Size".
●
If the sweep range is defined by means of the "Center" and "Span" variables, both
the "Span" value and the "Number of Points" can vary as the "Freq Step Size" is
changed. The "Span" is reduced as little as possible so that the condition "Freq Step
Size" = "(Stop – Start) / (Number of Points – 1)" can be fulfilled. Changing the
"Span" modifies the "Freq Step Size".
Note:
This setting is valid for linear frequency sweeps only. It does not apply to logarithmic
and segmented sweeps, power, time or CW Mode sweeps. Increasing the "Freq Step
Size" generally increases the measurement time.
Remote command:
Sweep Time / Auto
Varies the measurement time for a sweep or delays the start of each sweep.
●
"Sweep Time" is the total measurement time for the sweep. The minimum possible
sweep time is equal to the estimated value in "Auto" mode. Setting a larger sweep
time is equivalent to defining a
before each partial measurement.
●
"Auto" minimizes the sweep time. The "Meas. Delay" is set to 0 s. "Sweep Time"
indicates the estimated sweep time, depending on the current measurement settings.
The "Sweep Time" and "Meas. Delay" values are maintained until changed explicitly
if "Auto" is switched off.
If a time sweep is active, "Sweep Time" is not available. The analyzer uses the previously
defined sweep time settings.
Remote command:
Channel Settings